ONE EARTH (vis) — 414 pre-1600 records in 160 segments; knots every 300 y, step 0.25 h, max bend 0.75 h
  conventional: 65 of 65 landing records threaded by one curve (100%)
  alias chronologies (300 draws from each segment's own aliases): mean 100%, 95th pct 100%; 100% thread at least as well as the conventional
  conventional curve δ (hours vs library ΔT): 0:-0.75, 300:+0.00, 600:-0.50, 900:-0.25, 1200:-0.25, 1500:-0.25, 1800:-0.25